We’d better the Great Wall tomorrow.[ ]

He wants to try his best to make his dream(梦) ________.

Some people are worrying about the possibility ________ mobile phones could be responsible for a range of illnesses, from rashes(皮疹) to brain tumors．

The girl’s dream came _____ in the end.

Scientists say it may be five or six years ____ it is possible to test this medicine on human patients.