---Look! The light is still on. Is Mr Wu working in his office?---No, it _____ be Mr Wu. He has gone to Nanjing for a meeting.
–I’m afraid the price of the house is too high for me. --Yes, fewer and fewer common people can _________ to buy one.
Your washing machine doesn’t work.Is there __________ with it?
I feel stressed because Father is always strict _____ me _____ my studies.
Many students _________ our age have the same feeling-Growing up is hard.
You’d better _________ up late to complete your homework.It’s bad for your health.