Obama’s years in Indonesia were unforgettable for some of his former schoolmates _____ his teachers.
Such films _____ shown yesterday ______ not worth seeing again.
Sir, a Mr. Wang is waiting for you at the gate. ________ he come in or stay there?
When ________ to danger and conflict, men tend to increase blood pressure, ________ nervous and anxious.
It’s too bad that I failed in the math exam. If only I ______ hard at it!
The last decade of the 21st century ________ the rapid, steady development of China in various fields.