It's no longer a question now _____ man can land on the moon.
| A．when | B．that | C．whether | D．how |
His modest business eventually __________ into a supermarket empire.
| A．expanded | B．attained | C．attached | D．switched |
We went to the Lincoln Memorial yesterday, which was __________ with visitors from all over the world.
| A．common | B．mixed | C．full | D．crowded |
Bring an extra pencil with you __________ something goes wrong with this one during the exam.
| A．in case | B．in case of |
| C．so that | D．in order that |
I keep medicines on the top shelf, out of the children's.
| A．reach | B．hand | C．hold | D．place |
We had to __________ e-mails to over 600 people to inform them of the change of location.
| A．send up | B．send out |
| C．send for | D．send away |