[单项选择]If only I had been warned of the danger of going alone into the forest!
A. 如果我知道单独呆在森林的危险该就不会这样了!
B. 如果我知道呆在森林的危险该就不会单独去了!
C. 我呆在森林里又孤独又危险!
D. 如果有人提醒我单独呆在森林的危险该多好啊!

[单项选择]If only I had been warned of the danger of going alone into the forest!（）
A. 如果我知道单独呆在森林的危险该就不会这样了!
B. 如果我知道呆在森林的危险该就不会单独去了!
C. 我呆在森林里又孤独又危险!
D. 如果有人提醒我单独呆在森林的危险该多好啊!

[单项选择]What was the danger Albert Einstein had warned Roosevelt about

[单项选择]Although they had only been invited for lunch they ______ till suppertime.
A. stayed out
B. stayed on
C. stayed up
D. stayed off

[单项选择]The general ______ that the war had not been going as well as expected.
A. acknowledged
B. identified
C. recognized
D. acquainted

[单项选择]He had been working for the whole morning, only ______ to have a cup of tea.
A. breaking down
B. breaking through
C. breaking off
D. breaking up

[单项选择]Though the hotel has only been open for a few days, it is already ( ) booked.
A. expectantly
B. quickly
C. heavily
D. immediately

[单项选择]You（　）be tired, for you've only been working for an hour.
A. must not
B. won't
C. can't
D. may not

[单项选择]You ______ be tired, for you've only been working for an hour.

[单项选择]You ______be too tired-you've only been working for an hour.

[单项选择]Only when he had done it （） that he had made a mistake.
A. he then realized
B. did he realize
C. before he realized
D. he realized

[单项选择]Only when he had done it ______ that he had made a mistake.
A. he then realized
B. did he realize
C. before he realized
D. he realized

[单项选择]Unluckily, when I arrived he, so we only had time for a few words.
A. just left
B. has just left
C. had just left
D. was just leaving

[单项选择]The second injection should only have been given once the first drug had {{U}}taken effect{{/U}}.
A. taken place
B. injected
C. worked out
D. worked

[单项选择]Some important documents had been missing.

[单项选择]Lewis had to travel by bus (as) his car (had been damaged) in an accident some days (before) and he (was failed) to get it repaired.
A. as
B. had been damaged
C. before
D. was failed

[单项选择]

　　Although there had been various small cameras developed, it was not until George Eastman introduced the Kodak in 1888 that the mass appeal of photography attracted America and Europe and thereafter spread quickly to the far corners of the earth. Eastman called his new famous camera the Kodak for no particular reason except that he liked the word. It was easy to remember and could be pronounced in any language.
　　An immediate consequence of Eastman’ s invention was a blizzard of amateur photographs that soon became known as snapshots. The word came from hunters’ jargon. When a hunter fired a gun from the hip, without taking careful aim, it was described as a snapshot. Photographers referred to the process of taking pictures as shooting, and they would take pride in a good day’s shoot the way country gentlemen would boast about the number of birds brought down in an afternoon.
　　Photography became not only easy but fun because of the Kodak. Almos
A. A new folk art came into existence.
B. Enjoying pictures became a popular hobby.
C. The number of professional photographers increased quickly.
D. Camera clubs and associations flourished.