They soon realized that ________, the situation would get worse．

unless dealing with it carefully

if not carefully dealing with

unless carefully dealt with it

if dealt not carefully with

He slipped and had his leg broken．________, he will have to be away from school for two or three months．

In any case

After all

As a result

In this way

We must know what we should do and what we should avoid ________ a good impresson on others in public place．

to leave

leaving

to have left

leave

With a lot of difficult problems ________, the newly elected mayor felt like a cat on a hot pot．

settling

settled

to settle

being settled

After supper she would sit down by the fire, sometimes for ________ an hour, thinking of her young and happy days．

as long as

as soon as

as much as

as many as

The pilot lost touch with the military base, ________ his plane crashed in the desert．

by means of which

for fear of which

in terms of which

as a result of which

To read Tolstoy and ________ to nineteenth century Russian literature are two excellent reasons for taking Professor Morrel’s course．

to introduce

introduce

being introduced

be introduced

Though it’s a challenging job, he did it ________ it took me．

one-third a time

one-third time

the one-third time

one-third the time

I’m sorry I have to decline your invitation because of a ________ appointment．

former

last

previous

normal

As a candidate, you must make a good ________ on everyone you meet if you want to win the election．

decision

situation

impression

position