It seems oil____from this pipe for some time, we’ll have to take the machine apart to put it right.
| A．had leaked | B．is leaking |
| C．leaked | D．has been leaking |
相关试题
---Would you please take a short walk with us now? ---____. But I’m busy at present.
| A．Of course not | B．That’s all right | C．I’d like to | D．Sorry, I can't |
I ___, but I didn't think you were serious.
| A．shouldn't laughed | B．wouldn't laugh | C．shouldn’t have laughed | D．needn’t have laughed |
Generally speaking, that city is ___ crowded than ___ in the same area.
| A．less, the others | B．less, others | C．more, another | D．more, some other |
---I suppos he’s late again. ----You ___ it.
| A．are guessing | B．will guess | C．guess | D．have guessed |
---His pet bird ____this morning. He____still for quite a long time in his room crying.相关知识点
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