It hasn't been made clear ________ the new underground line is to be open to traffic.
| A．when | B．that |
| C．what | D．where |
— Do you think that housing price will keep ________ in the years to come?
— Sorry，I have no idea.
| A．lifting up | B．going up | C．bringing up | D．growing up |
After two months’ training，the astronauts are ________to adapt to the conditions of weightlessness.
| A．accustomed | B．coming | C．realized | D．succeeding |
I smell something ________ in the kitchen.Can I call you back in a minute?
| A．burning | B．burnt | C．being burnt | D．to be burnt |
I thought the girl nice，pretty and honest ________ I met her.
| A．first time | B．for the first time | C．the first time | D．by the time |
Nowadays，scientists are working hard to find a best way of treating addictions ________ drugs.
| A．of | B．in | C．on | D．to |