Cloning the sheep ----Dolly is a big in science.
| A．progress | B．run | C．jump | D．rush |
There______ more than one student who_______ late this morning.
| A．have been, was | B．has been, were | C．were, was | D．was, was |
Nowadays, most people，in order to keep fit，prefer walking to driving ____necessary.
| A．if | B．unless | C．in case | D．as if |
The expo will be held in Shanghai, _____a lot of advanced technology will be shown for the first time.
| A．where | B．which | C．when | D．from which |
We ____ last night, but we went to the concert instead.
| A．must have studied | B．might study | C．should have studied | D．would study |
_____with this challenge, he should meet it without any hesitation.
| A．Facing | B．Having faced | C．Being faced | D．Faced |