It is important to create an atmosphere _____ wild ideas are honored rather than dismissed.
a. of which b. as c. in which d. when
What great trouble we had ____ where his house was.
| A．in finding | B．to find | C．find | D．found. |
Not until I began to work ______ how much time I had wasted.
| A．didn't I realize | B．did I realize |
| C．I didn't realize | D．I realize |
Unless ___ to speak, you should remain silent at the conference.
| A．invited | B．inviting | C．being invited | D．having invited |
Although this medicine can cure youyour illness, it has a bad effect____you.
| A．for; in | B．for; on | C．of; on | D．of; at |
_______ it rain tomorrow, we would stay at home.
| A．Should | B．Be | C．Were | D．Will |