I'm sorry you've been waiting so long, but it'll still be some time _______ Sundance gets back.
| A．until | B．before | C．after | D．since |
___ new products have been successfully made in the factory.
| A．A great deal of | B．A number of | C．The number of | D．A great amount of |
Either you or I __ to blame for this.
| A．am | B．is | C．are | D．be |
--Was the driving pleasant when you vocationed in Mexico last summer?
----No, it ___ for four days when we arrived, so that the roads were very muddy.
| A．was raining | B．had been raining | C．would be raining | D．have rained |
Most of us think that the ocean bottom is ___ smooth land.
| A．made up for | B．made up of | C．made of | D．made by |
--Our guests are coming from Shanghai at 10:30.---Oh, I ___ it ___11:30.
| A．think, is | B．thought, was | C．have thought, will be | D．had thought, would have been |