C.must
从答语Don't you remember that we_____be home by 8p.m to see our favorite TV show?可见双方曾达成一致意见,即在八点以前【务必】赶到家以观看他们最喜欢的电视剧,故用must
C.must
从答语Don't you remember that we_____be home by 8p.m to see our favorite TV show?可见双方曾达成一致意见,即在八点以前【务必】赶到家以观看他们最喜欢的电视剧,故用must