摘要：27．--There is a lot of smoke coming out of the teaching-building there． --Really? It be a fire, most probably． A．can B．ought to C．have to D．must
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---There is a lot of smoke coming out of the teaching-building there．
---Really?It ________ be a fire, most probably．
- A.can
- B.ought to
- C.have to
- D.must
－There is a lot of smoke coming out of the teaching building there．
－Really．It ________ be a fire, most probably．
[ ]
A．can
B．ought to
C．have to
D．must
－There is a lot of smoke coming out of the teaching-building there．
－Really? It ________ be a fire, most probably．
[ ]
A．can
B．ought to
C．have to
D．must