— I don’t know next.
— Let’s ask our teacher for help.
| A．what to do | B．what should I do |
| C．how to do | D．how I should do |
I think ____ of the materials I listened to at the beginning of the exam ____ easy.
| A．three fourths; is | B．third four; are |
| C．three fourths; are | D．three fourth; are |
A little boy wrote _____ “u” and _____“n” on the wall.
| A．a; an | B．an; a | C．an; an | D．a; a |
--- Why do you often take exercise? --- _____ me keep fit.
| A．Help | B．Helping | C．To help | D．helped |
--- We went to see the man who was in hospital yesterday. --- __________.
| A．So did we | B．So we did | C．We did so | D．Did so we |
If H2 burn in O2, we can get _____.
| A．H2 | B．H2O | C．O2 | D．H2O2 |