—What's up? —I missed the train. By the time I got to the train station, the train for 10 minutes.
— ______ will I stay in Singapore during the summer holiday? — Let me check it for you. For two days.
We’d better ______ subjects like age, weight or money while talking in Western countries.
If ______ is a high-stress job, it is important that you learn how to relax after a busy day.
Eric will never win a gold in the swimming race ______ he works hard.
The solar-powered airplane Solar Impulse 2 arrived in Nanjing ______ April, 2015.