The scientist knew nothing about the matter, because he was always _________ himself in his study.
| A．burying | B．devoting | C．focusing | D．concentrating |
Any habit ______ slows down your silent reading to the speed at which you speak, or read aloud, is inefficient.
| A．which | B．/ | C．that | D．who |
—Here you are at last! What kept you so long?
—Sorry, I’m late. But do you know what great difficulty I have ______ your house.
| A．found | B．finding | C．to find | D．for finding |
_______ to be much chance of our catching him up in the near future.
| A．You don’t seem | B．It doesn’t seem |
| C．That doesn’t seem | D．There doesn’t seem |
Modern science and technology has ______ communication between people far apart.
| A．made it convenient for | B．made it convenient |
| C．made convenient | D．made it convenient to |
When _____ his view about his job as a teacher, Mike said he found it very interesting and rewarding.
| A．asking | B．asked | C．having asked | D．to be asked |