1.Ha Long Bay has about 1.969 islands
=>there..................................................
2.My old laptop is not as expensive as my new one
=>my old laptop is..............................
49.It/good/students/learn in groups/share their ideas.
50.Students/my school/must uniform/every school day.
1. Ha Long Bay has about 1.969 islands
=> There are approximately 1.969 islands in Ha Long Bay.
2. My old laptop is not as expensive as my new one
=> My old laptop is less expensive than my new one.
49. It is good for students to learn in groups and share their ideas.
50. Students at my school must wear a uniform every school day.
1->There are about 1969 islands in Ha Long Bay