China's first home﹣built aircraft carrier（航空母舰） hit the water in Dalian _______ the morning of April 26， 2017．（ ）
A．inB．onC．atD．to
Excuse me， do you know________？ I've just missed my train．
Yes． There is one in 10 minutes．（ ）
| A． |
how I can get to the train station |
| B． |
if there's another train later |
| C． |
when I should arrive at the train station |
| D． |
how much a train ticket costs |
Did you notice a man passing by？
No， I________on the phone．（ ）
| A． |
talk |
B． |
am talking |
| C． |
was talking |
D． |
talked |
It's impolite to ________your teachers' office without knocking at the door．（ ）
| A． |
describe |
B． |
check |
C． |
choose |
D． |
enter |
， I found the job boring， but soon I got used to it．（ ）
| A． |
To start with |
B． |
First of all |
| C． |
Without doubt |
D． |
After all |
The land is rain because it hasn't rained for several months．（ ）
| A． |
known for |
B． |
useful to |
| C． |
harmful to |
D． |
thirsty for |