[填空题]The feeling of "having nothing to do" may cause some retired people to feel robbed of ______.

[填空题]The feeling of "having nothing to do" may cause some retired people to feel robbed of ______.

[单项选择]Such crimes may be so complex that months or years go by before anyone （）them.
A. discovered
B. will discover
C. would have discovered
D. discovers

[填空题]It is not urgent, so you may do it _______________________ (在你方便的时候).

[填空题]Removing water from underground may cause earthquakes.

[单项选择]If I may be so（）as to advise you, my opinion is that you should not reply to his letter.
A. generous
B. humble
C. proud
D. bold

[单项选择]Parents who speak equivocally may cause their children to become confuseD（）．
A. ambiguously
B. angrily
C. adversely
D. contemptuously

[单项选择]Antipsyehotie medications may cause which of the following adverse effects（　）
A. Increased production of insulin.
B. Lower seizure threshold.
C. Increased coagulation time.
D. Increased risk of heart failure.

[填空题]Widely using PrEPs may cause potential problems like ethical issues and ________________.

[单项选择]Doctors believe that secondhand smoke may cause lung cancer in people who do not smoke. Nonsmokers often breathe in the smoke from other people’s cigarettes. This is secondhand smoke. The U.S. Environmental Protection Agency reports that about fifty-three thousand people die in America each year as a result of exposure to secondhand smoke.
The smoke that comes from a lit cigarette contains many different poisonous chemicals. In the past, scientists did not think that these chemicals harm a nonsmoker’s health. Recently, though, scientists expressed their opinion after they studied a large group of nonsmokers. They discovered that even nonsmokers had unhealthy amounts of these toxic chemicals in their bodies. As a matter of fact, almost all of us breathe tobacco smoke at times, whether we realize it or not. For example, we cannot avoid secondhand smoke in restaurants, hotels, and other public places. Even though many public places have nonsmoking areas, smoke flows in from the areas
A. because of the poisonous smoke they breathe in
B. if they live together
C. when there is no non-smoking area in the public utilities
D. though the poisonous chemicals contained in the smoke don’t harm them