They concentrated their efforts on ______ products of high quality.
A: turning on
B: turning off
C: turning out
D: turning over
A: turning on
B: turning off
C: turning out
D: turning over
举一反三
- The engine is () at 6,000 revolutions per minute. A: turning in B: turning off C: turning over D: turning to
- . Don’t forget _____________ off the light when you leave the room. A: turning B: turn C: of turning D: to turn
- I’m ____________ a roommate to share my apartment A: looking after B: turning over C: looking for D: turning around
- Walk for two blocks and then __________(turn / turning) left. A: turn B: turning
- There are some key factors ________ employees’ stress in their work. A: turning on B: leading to C: taking off D: carrying out