Mr. Bush is on time for everything. How ____ it be that he was late for the opening ceremony ?
| A．can | B．should | C．may | D．must |
________ 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 |
________ from what she said at the meeting, she must have lied to all of us.
| A．Judged | B．Judging | C．To judge | D．Judge |
Some experts believe it is the grandparents who ________ for the spoiled child.
| A．are to blame | B．are to be blamed |
| C．should blame | D．are blamed |