He was so tired that he fell asleep he went to bed．（ ）
| A． |
as if |
B． |
even though |
| C． |
ever since |
D． |
as soon as |
—Could you tell me ________?
—It’s about 6,300 kilometres long.
| A． |
how wide is the Changjiang River |
B． |
how wide the Changjiang River is |
| C． |
how long is the Changjiang River |
D． |
how long the Changjiang River is |
Before you get off the bus, you should wait ________ it has stopped.
| A． |
until |
B． |
but |
C． |
because |
D． |
so |
A lot of birds ________ in nature parks every year.
| A． |
protect |
B． |
is protected |
C． |
are protected |
D． |
protected |
He thanked me for ________ the mistakes in his homework.
| A． |
going out |
B． |
pointing out |
C． |
turning on |
D． |
putting on |
The painting is really valuable to him. He will never agree ________ it.
| A． |
sell |
B． |
sells |
C． |
sold |
D． |
to sell |