【推荐1】—I’m not sure ________ .
—Don’t worry. Just try your best.

A．when I can hear from him	B．if I can pass the driving test
C．whether he likes living here or not	D．how many times he has read the book

【推荐2】—Could you please tell me where Mr. White works?
—Two years ago he worked in a computer company in London, but I don’t know ________ he still works there now.

A．that

B．where

C．when

D．whether

【推荐3】We all want to know ____ or not the famous writer will come to our school.

A．if

B．that

C．whether

D．when

【推荐1】You can’t make progress in math learning ________ you work harder.

A．if

B．after

C．unless

D．because

【推荐2】Grade 9 students should keep exercising ________ they are busy with so many subjects.

A．if

B．until

C．though

D．because

【推荐3】You’ll fail in the exam ________ you have more practice.

A．if

B．unless

C．as long as

D．after