_______ to a task calls for perseverance and concentration, if you wish for the final success.
A. Committed B. Committing
C. Being committed D. To be committed
— Have you seen the cell phone I left here just now?
— No, sir. I _______ my English composition.
A. was polishing B. had polished
C. would polish D. have polished
Huawei is a global leader in telecoms with a great range of smart products to offer, many of __________exported abroad.
A. them B. which
C. it D. whom
house property tax come into effect, China might witness a fall in house prices.
A. Would B. Should
C. Could D. Might
I don't mind playing against a beginner，like myself，but I'm not going to _____ someone who has been playing chess for years．.
A. take up B. take on
C. take off D. take down
During the flight to the Moon, Chang’e II Satellite gradually ________ her direction so that she can go into her programmed orbit.
A. adjusts B. adapts
C. accepts D. adopts
