The plants ________ every three days, or they will fail to grow.
A.must water B.may water C.must be watered D.may be watered
The picture on the wall looks beautiful. It ________by Mr. Black two months ago.
A.painted B.was painted C.was painting D.paints
A talk on Chinese history，________in the school hall. I'm looking forward to it.
A.will be given B.will give C.is given D.gives
Basketball games are very popular nowadays. They ________ in many countries in the world.
A.hold B.are held C.held D.were held
I want to be a teacher in the future. Because teachers ________ in every part of the world.
A.need B.are needed C.were needed D.needed
We________ to finish the work on time, so we had to stay up late.
A.asked B.ask C.are asked D.were asked
