I have not seen him ______ he left.
| A．ever since | B．after | C．before | D．until |
Interestingly, the pet dog has been____to carry newspapers for its master.
| A． trained | B． checked | C． changed | D． turned |
She went to American two years ago .She ____there for half a year and then went to Japan.
| A． would work | B． worked | C． would be working | D．has been working |
China’s economy expanded 8.1 percent in the first quarter from a year earlier,___the slowest pace in almost three years.
| A． marking | B． to mark | C． having marking | D． marked |
So diffcult____it to fit in at school that she decided to drop out.
| A．found she | B． did she find | C． she found | D． she did found |
Wait for a while .I will get you something to drink.
Don’t ____.I have to leave now.
| A． worry | B． interrupt | C． disturb | D． bother |