Why not ride bicycles to the countryside with us this weekend? I’m sure you will enjoy yourself and come across the unexpected things.
More than one doctor _____ involved in the rescue that took place after the earthquake.
Some hard-working students always keep a torch in their domitories _____ there is a power failure.
_____ in charge of two classes made Mrs. Li, head of Senior Grade 3, extremely tired.
Almost every teenager will experience a period in their life _____ they aren’t content with their parents .
Little did the teacher imagine that a student good at maths _____ have failed in the exam.