Scientists have shown that there is a connection ____ cigarette smoking and certain diseases.
I had to ______ because someone else wanted to use the phone.
“Have great changes taken place in your village?” “Yes, A new school was ______ in the village last year.”
If the new arrangement doesn’t _____, we’ll go back to the old one.
All the girls swam in the lake except two, who _____ halfway.
—Did you reach the top of the mountain?—Yes. Even I myself didn’t believe I could______ it.