．I invited Mary and Jane to dinner, but of them came.
| A．none | B．either | C．both | D．neither |
It is often said that ____teachers lead _______very busy life.
A /, / B. /, a C. the, / D. the, a
—I’m going to play soccer now.
—________. It’s raining heavily outside.
| A．Good idea | B．It’s up to you | C．You’d better not | D．I have no idea |
No one has yet succeeded in solving the _____ of how life first began.
| A．biology | B．gravity | C．puzzle | D．theory |
Can you tell me ______?
| A．what does the island look like | B．what the island looks like |
| C．how does the island look like | D．how the island looks like |
—She looks very happy. She ______ have passed the exam.
--I guess so. It’s not difficult after all.
| A．should | B．could | C．must | D．might |