I really don’t think my best friend will be angry, but I’11 go and see her，in

 case she _______.

A．will be    B．is    C．does    D.has been

People have always been curious _________ how living things on the earth began.

  A. in         B. at       C. of        D. about

--- Could I use your computer for a few moments, please?

  --- ________. I’m not using it myself.

  A. Come on     B. It depends        C. Go ahead        D. That’s great

I'm happy that you agreed to work with us again．and I look forward to______

you next week．    

A．being seen     B．see    C．seeing     D．having seen

I wrote a letter of complaint(投诉)，and the airline have promised to _______the matter．    

A．1ook at．    B．1ook into    C．1ook after    D．1ook out

When the old man _______to walk back to his house，the sun________itself behind the mountain．

A．was starting；hid               B．had started；had already hidden

C．had started；was hiding          D．started；had already hidden

I spent five hours_____________ the book__________ I paid 10 dollars.

A. reading; that   B. to read; for that   C. read; which    D. reading; for which

Follow your doctor’s advice,_____ your cough will get worse.

A.or        B. and     C. then    D. so

All the things __________ must be done well．   

  A. worth to do          B. worthy of being done

  C. worthy doing         D. worth of doing

Jenny worked hard before the final examination，and it_______．She got an A．

A．showed off       B．paid off      C．put off     D．took off