–Do you think Professor Smith_________be in the lab?
--I’m not sure.
| A．must | B．shall | C．need | D．can |
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 |
.--- Hi ,Tracy, you look tired.
--- I am tired. I ____the living room all day.
| A．painted | B．had painted |
| C．have been painting | D．have painted |
Americans eat______vegetables per person today as they did in 1910.
| A．twice as much | B．as twice many | C．twice as many | D．as twice much |