At times _______ exercise can make us _______.
The new school _________ in the past five years. A built B has been built C has built D will be built
He _____China since he _____ to China. A learned , came B has learned , comes C have learned , came D has learned ,came
I go to sleep ____ the window ______
____ he _____ get up early?
Unless he _______, he _____the test.