[单项选择]In addition, teaching staff is willing （）extra help if a student needs.
A. providing
B. provide
C. provides
D. provided

[单项选择]In addition, teaching staff is willing to extra help if a student needs.
A. providing
B. provide
C. provides
D. provided

[单项选择]In addition, teaching staff is willing to{{U}} {{/U}}extra help if a student needs.
A. providing
B. provide
C. provides
D. provided

[单项选择]Ms. Wilkinson is always willing to do extra work by ______ if no one else can help.
A. she
B. her
C. hers
D. herself

[单项选择]Material choices such as timber and steel also help to keep the house cool, while light colours have been used on the exterior surfaces to ______ heat and blend in with the surrounds.


A. compel
B. repel
C. propel
D. expel

[单项选择]The body also needs daily doses of sunlight to help ______ Vitamin D, crucial for maintaining body functions and for the health of muscles and bones.
A. incorporate
B. synthesize
C. integrate
D. assimilate

[单项选择]Criticism and self-criticism is necessary（　）it helps us to find and correct our mistakes.
A. by that
B. at that
C. on that
D. in that

[单项选择]A: Hello! Professor Freeman's secretary. Can I help you
B: ______

[单项选择]It's good to know that the new software, which helps ______ programming time, keeps being developed.
A. reduce
B. reducing
C. reduced
D. reduces

[单项选择]

Text 2
The use of heat pumps has’ been held back largely by skepticism about advertisers’ claims that heat pumps can provide as many as units of thermal energy for each unit of electrical energy used, thus apparently contradicting the principle of energy conservation. Heat pumps circulate a fluid refrigerant that cycles alternatively from its liquid phase to its vapor phase in a closed loop. The refrigerant, starting as a low-temperature, low-pressure vapor, enters compressor driven by an electric motor. The refrigerant leaves the compressor as a hot, dense vapor and flows through a heat exchanger called the condenser, which transfers heat from the refrigerant to a body or air. Now the refrigerant, as a high-pressure, cooled liquid, confronts a flow restriction which causes the pressure to drop. As the pressure falls, the refrigerant expands and partially vaporizes, becoming chilled. It then passes through a second heat exchanger, the evaporator, which
A. cause for regret
B. sign of premature defeatism
C. welcome challenge
D. focus for an educational campaign

[单项选择]HEL7OKIT3Y MIAOZ7YEL NIY20HE7LM
A. 4
B. 5
C. 6
D. 7

[单项选择]If you know what the trouble is, why don't you help them to ______ the situation
A. simplify
B. modify
C. verify
D. rectify