We will ______ all the natural resources if we continue consuming them like that.
| A．run out | B．wipe out | C．drop out | D．hold out |
You can only be sure of ____ you have at present; you cannot be sure of something ____ you might get in the future.
| A．that, what | B．what, / | C．what, which | D．/ , that |
I went along the beach thinking of nothing ____.
| A．in brief | B．in doubt | C．in harmony | D．in particular |
The dangerous virus ____ in the next few weeks in the laboratory can cause fatal diseases.
| A．studying | B．studied | C．to study | D．to be studied |
All the dishes in this menu, unless ____ stated, will serve two to three people.
| A．aside | B．otherwise | C．meantime | D．or |
Edward, you play so well, but I _____ you play the piano.
| A．didn’t know | B．hadn’t known | C．don’t know | D．haven’t known |