He has been working hard day and night, which, of course, his tiredness.
| A．answers for | B．accounts for | C．applies for | D．stands for |
The taller children should stand at the back _____ everyone can see.
| A．so that | B．in order to | C．so as to | D．now that |
During the race many cars ______ while my new solar car came out first.
| A．broke out | B．broke away | C．broke down | D．broke up |
I was greatly ______ at how he worked out the ______ problem in a creative way.
| A．amazed; confused | B．amazing; confusing |
| C．amazed; confusing | D．amazing; confused |
In the garden there are a lot of flowers ______ I don’t know the names.
| A．of which | B．from which | C．to which | D．about which |
_______ basketball, the girl students are also encouraged to play football.
| A．As good as | B．As long as | C．As many as | D．As well as |