__________，his suggestion is not helpful, though it sounds very interesting.
| A．Generally speaking |
| B．On the contrary |
| C．In particular |
| D．To be honest |
As the Internet is expanding day by day, the opportunities for crime ______ as well.
| A．has | B．is | C．have | D．are |
— Have you finished your essay?
— Half when you come back.
| A．has been done | B．will have been done | C．had been done | D．is done |
The visitor asked to have his picture taken _________ stood the famous tower.
| A．that | B．what | C．when | D．where |
Mr. Wang made up his mind to devote all he could ____ his oral English before going abroad.
| A．improve | B．to improving | C．improving | D．to improve |
Staying in a different country, just watch others to see _____ they act to decide what the best to say is.
| A．What | B．Why | C．how | D．when |