They worked hard_____they finished their work ahead of time.

There is ______ American boy in our class and ______ boy can speak good Chinese .

“Don’t be late again , Tommy” “OK, _______.”

What about playing with the boys there in the water while learning swimming? — In my opinion, ________.

The situation at Omaha Beach was so bad _______ the soldiers succeeded in landing on the beach with a lot of people losing their lives.