If caught __ in Singapore, the person is definitely subject to heavy fines.[ ]

Is air the lightest thing in the world– Not .Scientists from Zhejiang University have just developed the world’s lightestmaterial.

Living things are dying out quickly.Let’s ask____destroying the in the pastyears.

She hasn’t watched the movie “So Young”, has she—__________. She told me it’s very moving and interesting, she’d like to watch it again

The International Day against Drugs,aimed at warning people to keep away from drugs， _________ on June 26th every year