—How long do you think it will be ________ we win the football World Cup?
—Perhaps twenty years.
| A．when | B．since | C．that | D．before |
The price of oil is increasing so rapidly.
Indeed ! The oil prices____by 10 and 20 percent so far.
| A． increased | B． increase | C． had increased | D． have increased |
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 |