_________ water to grow is well-known.
| A．That trees need | B．These trees need |
| C．That tree needs | D．Trees need |
The driver was at ____ loss when _____ word came that he was forbidden to drive for speeding．
| A．a, the | B．/, / | C．the, the | D．a, / |
—Did you enjoy yourself at the party?
—Yes．I've never been to ______ one before．
| A．a more excited | B．the more excited | C．a more exciting | D．the most exciting |
Fitness is important in sport, but of at least _____ importance are skills．
| A．fair | B．reasonable | C．equal | D．proper |
It's usually warm in my hometown in March, but it ___ be rather cold sometimes．
| A．must | B．can | C．should | D．would |
I have _____ all my papers but I still can't find my notes．
| A．looked through | B．looked for | C．looked after | D．looked out |