The weather has been cold ________ this spring．

by far

so far

the other day

at one time

We ________ our new neighbors yet, so we don’t know their names．

don’t meet

won’t meet

haven’t met

hadn’t met

Although medical science ________ control over several dangerous diseases, what worries us is that some of them are returning．

achieved

has achieved

will achieve

had achieved

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

has completed

have completed

have been completed

has been completed

Police are now searching for a woman who is reported to ________ since the flood hit the area last Friday．

have been missing

have got lost

be missing

get lost

Customers are asked to make sure that they ________ the right change before leaving the shop．

will give

have been given

have given

will be given

I won’t tell the student the answer to the math problem until he ________ on it for more than an hour．

has been working

will have worked

will have been working

had worked

Mary wanted to travel around the world all by herself, but her parents did not ________ her to do so．

forbid

allow

follow

ask

In order to discuss the problem, I ________ the class ________ four parts．

divided; from

separated; among

divided; into

separated; from

He was about to tell me the secret ________ someone patted him on the shoulder．

as

until

while

when