| Id | 2140 | 
|---|---|
| Category | Adverbial clauses and conjunctions | 
| Unit | Unit 86: If … not and unless; if and whether; etc. | 
| Rubric | Complete the sentences. Choose whether or if / whether if both words are possible. | 
| Question | We were a bit concerned as to whether we would be able to pay the bill. | 
| Choices | whether;if / whether | 
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