EBOLA（埃博拉） is said_______ another big health challenge to our humans over the past several months .
| A．becoming | B．to become |
| C．having become | D．to have become |
One of the methods of introducing foreign genes into a plant is to make use of certain
soil bacteria to infect the plant and transfer several of blue genes to the infected plant
cells, _____ in high rate of plant cell pision.
| A．results | B．resulting | C．to result | D．resulted |
What he had done is far from _____.
| A．satisfaction | B．satisfactory | C．satisfied | D．satisfying |
Luckily, the bullet narrowly missed the captain _____ an inch.
| A．by | B．at | C．to | D．from |
The ship sailed _____ Xiamen _____ 30 miles an hour.
| A．for, at | B．to, at | C．to, by | D．for, by |
It’s quite warm _____ January.
| A．in | B．for | C．on | D．at |