Your smile is one of the strongest tools that make ______ possible for you to meet new people.
| A．it | B．them | C．this | D．/ |
Child as he was，he ________ up with a good idea to solve the problem.
| A．came | B．put | C．kept | D．caught |
Yesterday I went ________ I spent the holiday last summer.
| A．where | B．when | C．what | D．which |
The classroom is big enough________，but we'll have to move if we have more students.
| A．for the moment | B．on the moment |
| C．in a moment | D．for a moment |
Through the window，we can see his large house________.
| A．in a distance | B．at a distance |
| C．in the distance | D．at the distance |
Mr.Smith as well as two of his students ________ the experiment with care at the moment.
| A．is doing | B．are doing | C．does | D．do |