After the mew technique was introduced ,the factory produced in 2001 as the year before.
| A．as twice many machines | B．twice many as machines |
| C．as many machines twice | D．twice as many machines |
Each of the students, hoping to pass the exam, _____the book.
| A．buying | B．having bought | C．should buy | D．to buy |
They kept trying _____ they must have known it was hopeless.
| A．if | B．because | C．when | D．where |
——What should I wear to attend his wedding party? ——Dress ____ you like.
| A．what | B．however | C．whatever | D．how |
He is only too ready to help others, seldom, ____, refusing them when they turn to him.
| A．if never | B．if ever | C．if not | D．if any |
It is what you do rather than what you say______matters.
| A．that | B．what | C．which | D．this |