Working in a coal mine is a hard job. It can be dangerous.

A. I don’t know anything about plumbing as I can’t fix the leak in the sink myself.

C. If I know something about plumbing, I can fix the leak in the sink myself.

D. I could fix the leak in the sink myself if I knew something about plumbing.

A. It spent me two hours doing the test at school yesterday.

B. I spent two hours doing the test at school yesterday.

C. I spent two hours to do the test at school yesterday.

D. It spent me two hours to do the test at school yesterday.

A. will hold

B. will held

C. will be held

D. holds

A. Yes, of course

B. No, not really

C. Yes, I could 

D. It’s so far.

A. not spending

B. not to spend 

C. not spend  

D. not spent

A. used to

B. is used to

C. has used to

D. was used to