Mr．White ________ his racing bicycle by himself yesterday, but I am not sure whether it is ready．

repaired

had repaired

was repairing

would repair

________ English for more than six years, he can speak and work very well with that businessman from England．

To have learned

To learn

Learning

Having learned

When the audience heard the alarm, they all hurried to ________ they thought was an emergency exit door．

what

which

where

who

The wild flowers looked like a soft orange blanket ________ the desert．

covering

covered

cover

to cover

How can you expect him to make any improvement ________ you never give him an opportunity to have a try?

unless

when

until

while

You must have the report ________ in half an hour．The boss is to speak at the meeting at 8 p.m．

to type

be typed

typing

typed

________ has been proven to be true that China has made great rapid progress in every field．

What

As

Which

It

Don't interrupt me, John．________ you force me to tell you the truth at the moment?

Need

Must

Should

Would

By improving reading skills, you can read faster and understand more of what you once ________ impossible to understand．

think

thought

had thought

are thinking

The little boy couldn't work the problem out．He wasn't ________ clever．

much

enough

even

that