He offered to her a hand as the suitcase was too heavy for her to carry.
| A．hold | B．show | C．lend | D．borrow |
________ the delayed flight will take off depends much on the weather.
| A．Why | B．When | C．That | D．What |
I________ along the street looking for a place to park when the accident________.
| A．went; was occurring | B．went；occurred |
| C．was going; occurred | D．was going; had occurred |
Not until_______ home ______he had had his wallet stolen.
| A．he returned, that he found |
| B．he returned, did he find, |
| C．did he return, he found |
| D．did he return,, did he find |
Playing on a frozen sports field sounds like a lot of fun. Isn’t it rather risky, _______ ?
| A．though | B．also | C．either | D．Too |
We would hesitate to pull over to the side of the road ________ a stranger in a car wave us down.
| A．should | B．were | C．if | D．if only |