It was ____ that he had to ask for help．
| A．so big work | B．so big a work | C．such a big work | D．such a big job[ |
—Where is Mother?
—She is in the kitchen. She ______the housework all morning.
| A． does | B．has been doing | C．has done | D．was doing |
Not knowing how to grow crops，the primitive people had no ______ but to gather the fruit and hunt animals for food.
| A．conception | B．command | C．virtue | D．alternative |
—Did you meet with the famous star yesterday?
—______ I had come a little earlier!
| A．If only | B．Only if | C．But for | D．For fear |
A lot of children never fully ______ their mothers until it is too late.
| A．urge | B．appreciate | C．accuse | D．motivate |
______ I admit that there are problems, I don't agree that they cannot be solved.
| A．As | B．If | C．While | D．When |