In face of the challenge for the moment, it’s most important to ________ a good state of health. [ ]

We feel our duty to make our country a better place.

We may find that learning a foreign language does not have to be________learning our mother tongue，but can in fact be twice ________

Motorists _____ of speeding may be banned from driving for a year.

The policemen were searching for the lost girl in the mountain for a whole night, _____. [ ]