. Dr. Frank failed many times but he finally _______ to find a successful way to solve the problem.
| A．broke off | B．broke out | C．broke down | D．broke through |
相关试题
My sister, an inexperienced
rider, was found sitting on the bicycle _____ to balance it.
| A．having tried | B．trying | C．to try | D．tried |
Each time _____ they met, they would talk long hours together.
| A．which | B．when | C．during | D．\ |
Cultural exchange __________ better understanding.
| A．make use of | B．make for | C．make up | D．make into |
When I opened the door, I found my father sitting in his chair, completely _____ in the humorous stories he was reading.
| A．lost | B．absorbing | C．attracted | D．addicted |
推荐套卷
粤公网安备 44130202000953号