An adjective clause is a clause that describes a noun. Because the clause is an adjective, it is positioned directly after the noun that it describes.

In the second example there are also two clauses: “glass” is the subject of the verb “contains”, and “she” is the subject of the verb “put”. In this sentence also, “that” is the adjective clause connector that joins these two clauses, and the adjective clause “that she put on the table” describes the noun “glass”.

In this example you should notice quickly that there are two clauses: “gift” is the subject of the verb “was”, and the verb “selected” needs a subject. Because there are two clauses, a connector is also needed. Answers (A) and (C) have connectors, but there are no subjects, so these answers are not correct. Answer (B) changes selected into a passive verb; in this case the sentence would have one subject and two verbs, so answer (B) is not correct. The best answer to this question is answer (D). The correct sentence should say: The gift which we selected for the bride was rather expensive. In this sentence “gift” is the subject of the verb “was”, “We” is the subject of the verb “selected”, and the connector “which” joins these two clauses.