问题：
[单选题]Merging is often used for translating English relative clauses which have _____.
Apassive structure
B“there + be” structure
C“look + adj.” structure
D“be + doing” structure
[单选题]Merging is often used for translating English relative clauses which have _____.
Apassive structure
B“there + be” structure
C“look + adj.” structure
D“be + doing” structure
