He was busy last night, otherwise he ______ to the meeting.
A great number of students ______ said they were forced to practise the piano.
At no time________the first to use the nuclear weapon.
__________ to sun, rain and wind for a long time, the stone split(裂开).
The arrangements for the English evening this weekend aren’t all_______;we needed another thirty chairs.
----Have the Smiths moved to California? -----Not yet, but they have ____________.