It is fairly common in Africa for there______ a group of expert musicians surrounded by others who also join in the performances.
A: being
B: to be
C: be
D: is
A: being
B: to be
C: be
D: is
举一反三
- 中国大学MOOC: It is fairly common in Africa for there______ a group of expert musicians surrounded by others who also join in the performances.
- The teacher stood there, __________ by a group of students. A: being surrounded B: surrounded C: having been surrounded D: to be surrounded
- The musician was playing the piano, _____ by a group of young people. A: surrounded B: being surrounded C: surrounding D: surround
- The control group A: generally has higher income than the control group B: has no difference with control group C: is group of individules who are not subject to the intervention being studied D: is group of individules who are subject to the intervention being studied
- The treatment group A: is group of individules who are not subject to the intervention being studied B: is group of individules who are subject to the intervention being studied C: has no difference with control group D: generally has higher income than the control group