It was _____ back home after the experiment.
It was \_\_\_\__ back home after the experiment.
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Under no circumstance _____ to tell lies to parents.
Under no circumstance \_\_\_\__ to tell lies to parents.
You’d better to go home now because it’s going to rain in no time.
You’d better to go home now because it’s going to rain in no time.
I am looking forward to _____ from you as soon as possible.
I am looking forward to \_\_\_\__ from you as soon as possible.