Was it in the science museum _______ you visited yesterday _______ you left your keys?
| A．that; where | B．that;/ | C．/; that | D．where; that |
Always read the_______on the bottle carefully and take the right amount 0f medicine。
| A．explanations |
| B．instructions |
| C．descriptions |
| D．introduetions |
Put the_______of your tongueagainst your upper teeth when you produce the sound。
| A．tip |
| B．top |
| C．peak |
| D．pole |
At the meeting they discussed three dif-ferent_______to the study of mathematics。
| A．approaches | B．means | C．methods | D．ways |
T0 make members 0f a team performbetter,the trainer first of all has to know their_______and weaknesses。
| A．strengths |
| B．benefits |
| C．techniques |
| D．values |
When Jane began to take swimminglessons,her main_______was the fear of water。
| A．evidence | B．crisis |
| C．obstacle | D．danger |