问题补充:
单选题WeplantoreachtheNorthPoleinmid-July,andbythenwe_______forsixweeks.A.are walkingB.have been walkingC.will be walkingD.will have been walking
答案:
D解析句中by then短语表示一个将来的时间状语,所以谓语用将来完成时,因此选D。
时间:2019-05-23 12:01:01
单选题WeplantoreachtheNorthPoleinmid-July,andbythenwe_______forsixweeks.A.are walkingB.have been walkingC.will be walkingD.will have been walking
D解析句中by then短语表示一个将来的时间状语,所以谓语用将来完成时,因此选D。