The open-air celebration has been put off _______ the bad weather.
| A．in case of | B．in spite of | C．instead of | D．because of |
So fast _____that it is difficult for us to imagine its speed.
| A．light travel | B．is light travel | C．does light travel | D．travels light |
Just as the tree is the unit of a forest and the book the unit of a library, ______ the molecule is the unit of matter.
| A．as | B．like | C．so | D．thus |
The door opened and in ________.
| A．rushed they | B．the children rushed | C．they rushed | D．did the children rush |
______ nobody was very enthusiastic about it, they decided to cancel the trip.
| A．See that | B．Seeing that | C．So | D．When |
I think our boat can pass the treacherous water ______ cautiously handled.
| A．until | B．if | C．lest | D．with |