He _____ English for ten years by the time he takes the examination.
| A．will have been studying | B．would have been studying |
| C．will study | D．studied |
________ beyond words, the businessman agreed to donate some money to help the sick.
| A．Moving | B．Moved | C．Being Moved | D．To moved |
The boys followed the marks that they ________, until finally they found their way back to the campsite.
| A．left | B．have left | C．had left | D．have been left |
________ their heavy load, the two brothers walked along the river bank.
| A．Carrying | B．Carried | C．To carry | D．Carry |
Research shows that teenagers ________ talk about their day with family members at the dinner table are less likely to engage in high-risk behavior.
| A．what | B．who | C．whom | D．\ |
Jane had just finished her homework ________ her mom asked her to practice playing the violin yesterday.
| A．when | B．while | C．after | D．before |