安吉卫生局:We must have the pipe fixed immediately.It ____(leak)for a whole week.
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has been leaking
现在完成进行时 ,从过去某时间持续到现在,且仍将继续
We have worked out the plan and now we must put it into _____
We must have the pipe fixed immediately.It ____(leak)for a whole week.
we must study hard for the ()
we must try our best. For we belong to ourselves and we have
we have friends all over the w___
We have four lessons the morning
when we began to have the internet?
We must carry on the struggle____pollution____clearer air and water.
We must listen to the teachers.(改一般疑问句)
Don't cross .We must wait ()the green light