--------Is Peter here yet? --------Not yet,but he __D_____be here soon .He usually is on time. A.would B.could C.should D.must 选D,must表示肯定性猜测,因为“他通准时He usually is on time. ”我们做这道题了,绝对选D。
选:A
A
选B could 表示可能性的猜测或者:will
D