An interesting suggestion for measuring the atmosphere around Mars has been _________, thus leading a heated discussion among the scientists.
The most important thing to keep in __________ mind when dealing with __________ emergency is to stay calm.
She __________ play a joke on him in case he becomes angry.
I can __________ the way you treat me, but I hate it when you treat the old like this.
We should learn from past mistakes so as to avoid __________ into the same old trap (困境) again.
—Is Steve very strict __________ his children?—Yes. He is also very strict __________ his own work.