When exposed to stress, in ________ form, all of us react both chemically and physically.
| A．whichever | B．whatever | C．however | D．whenever |
When Madam Cuirie did the science experiement again, she was more careful where she _____ a mistake.
| A．made | B．has made | C．was making | D．had made |
Before she realized what happened, she got ___ on the head and lost consciousness.
| A．hit | B．to be hit | C．hitting | D．to have been hit |
------I’ve been told that John ________ from his journey to India.
What about visiting him tonight?
------- Great. I’ll call for you at 6:30pm.
| A．had come back | B．is back | C．came back | D．coming back |
—Do you like the material?
—Yes, it ___________ very soft.
| A．is feeling | B．felt | C．feels | D．is felt |
—Where is Xiao Wang?
—I don't know．He__________ be in the library.
| A．can | B．must | C．might | D．may |