Silk ______ one of the primary goods traded along the Silk Road by about 100BC．（ ）
| A． |
had become |
B． |
was becoming |
| C． |
has become |
D． |
is becoming |
--Going to watch the Women's Volleyball Match on Wednesday?
--_________! Will you go with me?
| A． |
You there |
B． |
You bet |
C． |
You got me |
D． |
You know better |
The disappearance of dinosaurs is not necessarily caused by astronomical incidents. But _________explanations are hard to find.
| A． |
alternative |
B． |
aggressive |
C． |
ambiguous |
D． |
apparent |
--What does the stuff on your T-shirt mean ?
--It's nothing. Just something _________.
| A． |
as clear as day |
B． |
off the top of my head |
| C． |
under my nose |
D． |
beyond my wildest dreams |
Determining where we are _________our surroundings remains an essential skill for our survival.
| A． |
in contrast to |
B． |
in defense of |
C． |
in face of |
D． |
in relation to |
He's been informed that he _________for the scholarship because of his academic background.
| A． |
hasn't qualified |
B． |
hadn't qualified |
C． |
doesn't qualify |
D． |
wasn't qualifying |