_________ he met with the difficulty did he realize the importance of our help．

Even though

Not until

Only before

Ever since

Everything __________ into consideration, they ought to have another chance．

taken

to take

to be taken

taking

The Koala is ________ tree-climbing animal which lives in ________ Australia．

a, the

the, the

不填；不填

a, 不填

Although Mr．Black is a young, he has a large company to __________．

watch

make

run

work

I was so familiar with him that I recognized his voice __________ I picked up the phone．

while

after

in case

the moment

When delivering the speech, you can __________ your note if necessary．

refer to

come across

look after

watch out

Does the way you thought of __________ the river water make any sense?

cleaning

to clean

how to clean

being clean

In western society, the part __________ church plays in people’s life is very important．

where

how

when

that

If the time for the meeting is changed, please inform me __________．

on purpose

in advance

in general

by chance

You __________ the results of the experiment by next Wednesday．

have learnt

will learn

will have learnt

would have learnt