The students in the university are all taking courses _______ a degree.
| A．coming to | B．going to | C．leading to | D．turning to |
So difficult ________ it to live in an English－speaking country that I determine to learn English well.
| A．I have felt | B．have I felt | C．I did feel | D．did I feel |
The medicine is supposed to cure this disease, but I’m not sure it.
| A．does | B．was | C．has | D．is |
----No one is so ____ about his joy as Doctor Li.
----You are right. He devotes all his time and energies to his cause.
| A．mad | B．wild | C．serious | D．crazy |
Hundreds of _____ of science fiction are published each year in our country.
| A．styles | B．titles | C．subjects | D．topics |
----Are you sure that he is able to do the work well?
---- _______ he could give his mind to it.
| A．In case | B．If only | C．On condition that | D．Unless |