—Must I turn off the gas after cooking ? —Of course . You can never be _______ careful withthat.
—What do you admire the spaceman ______? —His bravery to travel around the earth ______ a spaceship all alone.
Are you ______ your son has difficulty in studying at school?
The number of deaths from heart disease will be reduced greatly if people ______ to eat more fruit and vegetables.
Sent to the zoos in Beijing and other cities, the monkeys are reported ______.
This year there is ______ rain and the trees are ______ fruits.