It is _______ he had to send his brother to hospital _______ he was late.

____ important to learn English well.

 If you have a job, ________ yourself to it and finally you’ll succeed.

It is usually not quite cold in this area in March, but sometimes temperature________ be very low.

— Why didn’t they complete the task in time?— Because it was not until late afternoon _____ they began to solve the major problem．