________ they ________ a cow yesterday？
| A．Did；milked |
| B．Did；milk |
| C．Do；milked |
| D．Do；milk |
In our school library there a number of books on science and the number of them growing larger and larger.
| A．is , are | B．are , is | C．has , is | D．have , are |
—Which is the biggest number of the four?
— ．
| A．One-third | B．Two-thirds | C．A half | D．A quarter |
His father and mother often argue _______ what TV programmes _________.
| A．with; watching | B．about; watching |
| C．with; to watch | D．about; to watch |
---Can I get you a cup of coffee?---_____________.
| A．That’s very nice of you | B．With pleasure |
| C．You can, please | D．Thank you for the coffee |
---It was ___________ who helped us out of danger.
---What brave and helpful children! We should learn from them.
| A．they | B．them | C．their | D．theirs |