You（）to lock the door at night.

1、There was a knock at the door. It was

There was a knock at the door. It was the second time someone （）(打扰我) that evening.

2、AWhen you look at the sky at night，the

AWhen you look at the sky at night，the moon looks bigger than the stars． In fact，the moon is much smaller than the stars．It is much smal...

3、In the event of a fire, the doors to a

In the event of a fire, the doors to a stair tower must be closed to prevent the spread of fire by （）.AconvectionBconductionCradiationDventilatio

4、At night，if you see a vessel ahead dis

At night，if you see a vessel ahead displaying the lights shown you should（）.Aprovide assistance as the vessel is in distressBstay clear as t...

5、At the same time，it is（）for you to sig

At the same time，it is（）for you to signify your acknowledgement of the responsibility for the collision by signing the copies of this letter hereto attached and to return me two copies in due time.AessentialBimportantCgoodDa better operatio

6、You（）to lock the door at night.

You（）to lock the door at night.AshouldBoughtCmustDshall