We sent the letter by airmail (以便他们能及时收到).
正确答案:sothattheycouldreceiveitintime\/inordertoreachthemintime
sothattheycouldreceiveitintime\/inordertoreachthemintime
We sent the letter by airmail (以便他们能及时收到).
正确答案:sothattheycouldreceiveitintime\/inordertoreachthemintime
sothattheycouldreceiveitintime\/inordertoreachthemintime