The level of the river ___ 20 centimeters over the security line and ____must be taken to control the flood.
A. is measured; measures B. measures; measurement
C. measures; measures D. is measured; measurement
Edison asked his father why the hens could hatch eggs ___he couldn’t.
A. as B. and C. when D. while
The new suspension bridge ___by the end of last month.
A. has been designed B. had been designed C. was designed D. would be designed
---How often do you attend the evening classes?
---_____, three times per week.
A. On the whole B. On average C. Little by little D. In all
The sun was shining brightly, ____ everything there look more beautiful.
A. making B. to make C. made D. having made
---May I use your computer, Alex?
---Sorry. Mine _____.
A. has repaired B. is being repaired C. has been repaired D. is repairing
