The companies are working together to create ________ they hope will be the best means of transport in the 21st century.
| A．which | B．that |
| C．what | D．who |
They were ______ little children that they didn’t know what to do.
| A．so | B．such | C．as | D．too |
Shortly after we ______, a waiter came over to us with a smile.
| A．sat | B．seated | C．was seated | D．seated ourselves |
The reason _____ he gave for not coming to your birthday party is ______ his mother was ill.
| A．what; which | B．why; that | C．as; which | D．which; that |
Who do you think the teacher will ______ the question?
| A．have answer | B．have answered | C．have to answer | D．has answered |
The man will have to wait all day ______ the doctor works faster.
| A．if | B．unless | C．where | D．that |