Let's learn to use the problem we are facinga stepping-stone to future success.
Students are encouraged to _________ the design competition for robots at the university.
Is _______ some German friends visited last week?
-- We are going to hold a sports meeting tomorrow.-- __________ it rains?
She was scared _______ when hearing the sound of explosion.
—Are you going to take part in the speech contest?— ___________. It’s too good an opportunity to miss.