He was ill, and ______ could not come.
A: because
B: so
C: therefore
                    A: because
B: so
C: therefore
举一反三
- Because Mr. Brown was ill, _____ he didn't come yesterday. A: so B: or C: /
 - He must be ill , __________he looks so pale . A: since B: because C: as D: for
 - The reason why he hasn’t come is _______. A: because his mom is ill B: because of his mom’s being ill C: that his mom is ill D: for his mom is ill
 - It was because of his laziness ________ he failed the final exam. A: so B: that C: so that D: therefore
 - He kept practicing English ________ he could pass the next interview. A: so as to B: so that C: so to D: because
 
