Don't worry; the guide will tell you how to avoid __________ ill while travelling.
| A．to get | B．being got |
| C．getting | D．to be getting |
_____ you are familiar with the author’s ideas, try reading all the sections as quickly as you possibly can.
| A．Now that | B．Ever since | C．So that | D．As long as |
Before the first nonstop flight made in 1949, it_____ necessary for all planes to land for refueling.
| A．would be | B．has been | C．had been | D．would have been |
Students who pass the test will be ______ to the next grade, as has been announced.
| A．possessed | B．promoted | C．proposed | D．appealed |
When choosing a product, I sometimes try to figure out the meaning___ to its brand name.
| A．attaching | B．having attached | C．to attach | D．attached |
There is hardly an environment on earth ______ some species of animal or other have not adapted successfully.
| A．to which | B．in which | C．for which | D．on which |