—________ will you stay in Shenzhen for your summer vacation?
—For about two weeks.
| A．How far | B．How often | C．How soon | D．How long |
The door opened and there.
| A．entering our English teacher |
| B．entered our English teacher |
| C．did our English teacher enter |
| D．our English teacher entered |
the project as planned, we’ll have to work two more hours a day.
| A．To complete | B．Complete | C．Completing | D．Completed |
You don’t need to make fancy foods to impress guests—it is something simple but good _____ will do.
| A．what | B．that | C．which | D．who |
The school has developed an online systemstudents can choose their own teachers.
| A．which | B．that | C．whom | D．where |
We’d better stay here a little longerhe turns up unexpectedly.
| A．although | B．in case | C．since | D．if only |