The travel expenses __________$ 1,000.
—Mummy, could you buy me a skirt like this? —Certainly. We can buy ________ one than this, but ________ this.
There is ________ in population that a food shortage is caused.
________ with the other students, the girl has better listening and speaking ability.
He always helps us ________ he is doing when we turn to him for help.
—How many photos have you taken? —I’ve taken 60 ________. I’ll take more.