He was walking in the street in the darkness when he heard someone ________ out a ________ scream．

A．let; frightening

B．let; frightened

C．to let; frightening

D．to let; frightened

He was hoping to go abroad but his parents ________ that they won't support him unless he can borrow money from the bank．

A．were deciding

B．have decided

C．decided

D．will decide

Measures have been taken to solve the problem, but it may be some time ________ the situation improves．

A．since

B．when

C．unless

D．before

The pollution in this city ________ serious for quite a few years．

A．keep

B．last

C．remain

D．continue

－Why do you look so upset?

－There are so many troublesome problems ________．

A．remaining to settle

B．remained settled

C．remaining to be settled

D．remained to be settled

－That's a lovely dress．You look good in it．

－Really? Thank you．My aunt gave it to me for my birthday, but I don't ________ the color．

A．go in for

B．care for

C．feel about

D．concern about

The construction of the two new railway lines ________ by now．

A．has completed

B．have completed

C．have been completed

D．has been completed

It was already past midnight and only three young men ________ in the tea house．

A．left

B．remained

C．delayed

D．deserted

I ________ in London for many years, but I've never regretted my final decision to move back to China．

A．lived

B．was living

C．have lived

D．had lived

At the meeting they discussed three different ________ to the study of mathematics．

A．approaches

B．means

C．methods

D．ways