It ______ that China ______ its first homemade aircraft carrier (国产航空母舰) in the water in Dalian on April 26, 2017.

Wedidn’t find Smith attending the lecture——Noone __________ him about __________ a lecture the following day

The book about environment ______ the importance of protecting the earth.

id not see him at the lectureyesterday．— You _______ him, since I went to aninternational conference with him．

If you keep on your research, you will succeed _____.