— ______people travel every year?
— Perhaps when we are talking about it. More than 100 planes have taken off around the world.
| A．How many | B．How much | C．How long | D．How often |
Alice had a wonderful time yesterday,_______?
| A．hadn’t she | B．wasn’t she |
| C．didn’t she | D．wouldn’t she |
Mary told me that the book must ______ to the library in two days.
| A．be return | B．be returned |
| C．been returned | D．return |
______ you wait a few more minutes? It’ll be your turn soon.
| A．Must | B．Should | C．Could | D．Might |
–- How long may I ______ your bike?
-- For a week. But you mustn’t _____ it to others.
| A．borrow, lend | B．keep, lend |
| C．lend, borrow | D．keep, borrow |
_______ it’s difficult to make her dream come true, she never gives up.
| A．Though | B．Unless | C．Because | D．If |