The zoo keepers is worried because the number of visitors __ smallerand smaller.
Is it the country _____ you studied English _____ you are going to visit next week?
_____ the oil price is on the rise, lots of people go to work by BMW instead of driving cars.
Who would you rather _____ with you tomorrow morning?
Will you please tell me the way you think of _____ the problem as soon as possible?
He made a suggestion _____ the meeting _____ be put off until next Tuesday.