Don't use water to put out the fire if oil catches fire. As is known, oil ________ float on water.
| A．shall | B．must |
| C．may | D．will |
Don’t bother to look for my dictionary--- it ______ some day.
| A．turns up | B．has turned up |
| C．will turn up | D．is going to turn up |
I know Mr. Brown; we ______ to each other at an international conference.
| A．are introduced | B．are been introduced |
| C．were introduced | D．had been introduced |
--- I will come to attend your lecture at 10:00 tomorrow.
--- I’m sorry, by then my lecture will have ended and I ______ my guests in my office.
| A．is being met | B．will meet |
| C．will be meeting | D．will have met |
The traffic in our city is already good and it ______ even better.
| A．gets | B．got | C．has got | D．is getting |
--- Why? Tom, your shirt is so dirty!
--- Mum, I ______ my storeroom downstairs.
| A．cleaned | B．have cleaned |
| C．was cleaning | D．have been cleaning |