THE EXISTENCE OF MANY STARS IN THE SKY ________ US TO SUSPECT THAT...

TRAC NGHIEM PHAN THI TRONG TIENG ANH TONG HOP WITH KEYS TRAC NGHIEM TENSES TONG HOP

52. The existence of many stars in the sky ________ us to suspect that there may be life on another planet. A. Have led B. leads C. lead D. leading