The little girl was jumping __________ in the kindergarten, waiting for her mother.
| A．upside down | B．back and forth | C．back to forth | D．up and down |
Glass is _______ and must be handled with great care.
| A．sensitive | B．smooth | C．flexible | D．fragile |
Maybe you could be an inventor ---- maybe even good enough to ______ an idea for the next iPhone or new medicine for cancer.
| A．put up with | B．keep up with | C．catch up with | D．come up with |
_______ excited his parents most is that he had passed the entrance exam and was admitted into his dream college.
| A．That | B．What | C．Which | D．It |
With ______ successful launching of Tiangong-1, China’s space dream has taken ______ step closer to reality.
| A．the; a | B．/; a | C．a; the | D．the; / |
The speed ______ Tom drives his car is too high.
| A．in which | B．at which | C．at that | D．in what |