| 1. |  have been waiting |
|---|---|
| 2. | has been learning |
| 1. | We met on the day when both of us went to the library. |
|---|---|
| 2. | That is the reason why the dog was named Kuro. |
| 1. | find it comfortable to sit |
|---|---|
| 2. | think it better that we email her |
| 1. | b |
|---|---|
| 2. | b |
| 3. | a |
| 1. | found it impossible to solve the problem |
|---|---|
| 2. | the day when he asked me |
| 3. | have been working on the problem |
| 4. | think it important that parents protect |
| 1. | where she was born |
|---|---|
| 2. | has been standing for an hour |
| 3. | how I met my boyfriend |
| 4. | it secret that he had |
