If you don’t communicate your ideas ______ others, how can they understand you?[ ]

Passengers on board aren’t allowed _____ calls duringtake-off.

I __________ a gift yesterday, but I didn’t ________it.

uth-East Asia, many farmers cannot afford _____ farm equipment such as tractors, so most of the work is done with human labour.

Tom! I looked for you everywhere at the party last night.—Oh, I to the party.