About ____ gene-targeting drugs are already in testing pipeline. It won’t be long ____ they are put into effect.
We decided to ______ a chance on the weather and have the party outdoors.
The thief had himself _____ by the police when he was trying to break into the hotel.
The reason was _____ I was busy with my work at that time.
. He misunderstood _____ I said.
. The trouble is _____ we are short of hands.