17. He can’t send E-mail because he (not get) doesn't get a modern for his computer. ( HTĐ)
18. When we (get) got to the restaurant, we (find) found that nobody (remember) had remembered to reserve a table.
trong câu 18, hành động xảy ra nối tiếp nhau chia QKĐ ; hành động xảy ra trước 1 hành động chia QKHH