The supermarket rules state that no goods ________ be taken out of the supermarket, ________ paid for by the shopper.
| A．must; once | B．should; when |
| C．can; if | D．shall; unless |
----- I know a little about gardening. Could I make some suggestions?
| A．Go right ahead | B．Take it easy |
| C．You will make it | D．Don’t mention it |
---- Has Sam finished his homework today?
---- I have no idea. He ________ it this morning.
| A．did | B．has done | C．was doing | D．had done |
In ________ most countries, a university degree can give you _________ flying start in life.
| A．the; a | B．the ; / | C．/ ; / | D．/; a |
It is the first time that Martin has been to the South Pole, ________?
| A．isn’t he | B．hasn’t he | C．isn’t it | D．hasn’t it |
If it _____ for the heavy rain then, we would have arrived here ahead of time.
| A．shouldn’t be | B．weren’t | C．had not been | D．be not |