______ is known to all, the earth travels round the sun once every year．
| A．That | B．As | C．What | D．It |
The manager has to get all these washing machines
| A．to deliver | B．be delivered | C．delivered | D．delivering |
The air company going from bad to worse, the workers____________ hardly enough to make a living.
| A．are paid | B．are paying | C．have paid | D．paid |
The question came up at the meeting____________ we had enough money for our research.
| A．that | B．what | C．which | D．whether |
--Was Tom there when you arrived?
--Yes, but he___________ home soon afterwards.
| A．had gone | B．has gone | C．is | D．went |
--What is the model plane like?
--Well, the wings of the plane are___________ of its body.
| A．more than the length twice | B．twice more than the length |
| C．more than twice the length | D．more twice than the length |