We haven't settled the problem of ________ it is necessary for him to study abroad.
| A．why | B．whether |
| C．what | D．how |
-Are you satisfied with her answer?
-Not at all. It couldn’t have been _____.
| A．worse | B．so bad | C．better | D．the worse |
. -What do you think of the book?
-Oh, excellent. It is worth _____ second time.
| A．to read a | B．to read the | C．reading a | D．being read the |
The three college students did what they could _____ the two children, although they was in danger.
| A．rescue | B．rescued | C．to rescue | D．rescuing |
-Have you got your test result?
-Not yet. The papers _____.
| A．are still being corrected | B．are not correcting |
| C．have already been corrected | D．have not corrected |
_______ a mobile phone can you ring _______ you want to talk with anywhere .
| A．Using; whoever | B．Only on; whomever | C．By; whomever | D．With; whoever w |