问题

When he ____ a light in his bedroom, the whole house had a power cut.
A:The number of; is; two hundreds
B:The number of; is; two hundred
C:A number of; are; two hundreds
D:The number of; are; two hundred;
B:The number of; is; two hundred
C:A number of; are; two hundreds
D:The number of; are; two hundred;
正确答案是: