The researehers delermine what type of plants the virus can infect(感染) and_________insects can carry the virus.
| A．those | B．why | C．which | D．how |
We work together to achieve our common purpose：_________world that is safer, cleaner and healthier than one we found．
| A．the；the | B．a；不填 | C．a；the | D．the；不填 |
Boris has brains. In fact, I doubt whether anyone in the class has ____ IQ.
| A．a high | B．a higher | C．the higher | D．highest |
William’s first stop was in _____ is a small town under the Himalayas.
| A．where | B．which | C．that | D．what |
_______ you feel exhausted after the long tiring journey, you may as well take a good rest at home.
| A．So that | B．In that | C．Now that | D．In order that |
----Would you mind if I turned off the light?
----____________.
A．Yes, go ahead  |
B．No, please don’t | C．Go ahead, please | D．Certainly, do as you please |