The professor spoke so fast during thelecture that we couldn’t _____ what he said.

What impressed you most in President Xi Jinping’s New Year Speech—_______ he gave the Chinese people a thumbs-up.

－ season do you like better, spring or summer－Spring. It’s neither hot nor cold.

My friend and I often ______ the waves on our surfboard.

－Where are the children The school bus is leaving.－ I wish they ______ always late.