China’s population is expected to increase to about 1.5 billion, ____ it will start to decline slowly.
A. after that B. since when C. on which D. after which
Your daughter ____ to be a famous musician, so you should keep her practicing the piano.
A. promises B. agrees C. expects D. pretends
We think that it’s love, generosity and perseverance make the world it is today.
A. what; that B. that; what C. which; what D. which; that
—Have you checked the engine?
—Yes, I did twice; there ______ be anything wrong with the car.
A. won’t B. mustn’t C. needn’t D. shouldn’t
There came a point in his life____ he had to think about seriously about his future.
A. what B. that C. when D. which
The old lady is said to have three children，two of ____studying abroad.
A. whom B. them C. all D. who
