30. It is a good city for cycling because it is flat and ________is convenient for bikes.
Unlike watching TV, reading is a highly active process (过程) _______ it requires attention as well as memory and imagination.
Ted couldn't remember the exact date of the storm, but he knew it was _______ Sunday because everybody was at _______ church.
. With two months _______,we'll have to say good-bye for our school life will be ending.
—The woman biologist stayed in Africa studying wild animals for 13 years before she returned. —Oh, dear! She _______ a lot of difficulties!
It was in the lab, _______ was taken charge of by Mrs Smith, they found the missing necklace.