You will be late ________ you leave immediately．

unless

until

if

or

He usually goes to work on foot ________ it rains．

except

except for

except when

besides

He is so careless that he is ________ making mistakes in his homework．

extraordinarily

completely

continuously

constantly

We must ________ the construction pace in order to meet the demands of the people．

make up

carry up

speed up

bring up

How pleased the detective was ________ what his customer told him!

hearing

to hear

heard

to hearing

He failed in the exam again because he ________ confidence to pass it．

lacked

was lacking

lacked of

was lacking of

In the dark forests_____________, some large enough to hold several English towns．

stand many lakes

lie many lakes

many lakes lie

many lakes stand

Mary kept quiet about the accident ________ lose her job．

so not as to

so as not to

so as to not

not so as to

One advantage of playing the guitar is ________ it can give you a great deal of pleasure．

how

why

that

when

I would have told him the answer had it been possible, but I ________ so busy then．

had been

were

was

would be