Each member country of WTO must ______ its laws and regulations and compete on the principle of fairness and co-operation.
Only by imagining and creating ____ a difference.
Most of the teachers ______ to visit our school were young ones.
—Do you like rock music , Ann ? — ________ . It’s too noisy to me .
The writer ___ his writing so that he forgot to have his lunch.
The girl looked at me with a _______expression. Maybe the problem was quite ______.