It is not ________ it is useful to study nature but he takes pleasure that the scientist study nature.
| A．until | B．though | C．because | D．since |
It was she that ________a sharp whistle, which makes ________possible for us to catch the thief.
| A．gave off; this | B．gave out; that | C．gave; it | D．sent out; them |
Which city in England do you think may be called __________Shanghai of ________West?
| A．a; the | B．the; 不填 | C．the; the | D．不填；the |
I’d like Jane, _____Joan, to go to the farewell party on behalf of (代表) our class.
| A．more than | B．less than | C．rather than | D．or other |
If we________ , we can realize the progress we have made in space research.
| A．turn back | B．look back | C．answer back | D．move back |
They arrived at the farmhouse, in front of which _________.
| A．is sitting a boy | B．sat a boy | C．a boy sat | D．a boy is sitting |