Was there any difficulty for you ________ her house?

to find

finding

to go

going

It is a ________ the women holding a baby are first offered seats on a bus．

rule

practice

measurement

demand

Have you visited the theater built on ________ used to be a temple?

where

that

what

when

________ is hard is to do well all one’s life and never do anything bad．

He

It

That

What

The Parkers bought a new house but ________ will need a lot of work before they can move in．

they

it

one

which

The problem of ________ become a serious one．

dealing with waste plastics have

deal with waste plastics have

dealing with waste plastics has

to deal with waste plastics has

I ________ that you could come to help me out of the trouble．I am quite wrong．

expect

expected

would expect

had expected

It is widely accepted that young babies learn to do things because certain acts lead to ________．

rewards

prizes

awards

results

(经典回放)The research is so designed that once ________ nothing can be done to change it．

begins

having begun

beginning

begun

It is known to all that ________ you exercise regularly, you won’t keep good health．

unless

whenever

although

if