Difficult _____ in practice, this new technique hasn’t been applied.
| A．operated | B．to be operated | C．operating | D．to operate |
A team of 15 Indian experts are organizing to help us , most of _____ women.
| A．them | B．them are | C．whom | D．that |
. I’m thinking of _________ we can do more for the people.
| A．if | B．that | C．what | D．how |
.The headmaster hurried to the concert hall only _________ the speaker_____
| A．to find; left | B．to find; gone | C．finding; left | D．finding; gone |
—I failed again. I wish I _________ harder.
—But you _________.
| A．had worked; hadn’t | B．worked; don’t | C．had worked; didn’t | D．worked; didn’t |
-What did you do yesterday afternoon?
-I went to the bookstore，___ some books and visited my uncle.
| A．to buy | B．bought | C．Buy | D．buying |