Step 1: Identify the reporting verb and decide on backshift
Reporting clause: Rafi told Mary.
The reporting verb told is in the simple past. For ordinary statements (not universal truths), English backshifts the tense of what was said.
Present Continuous $\Rightarrow$ Past Continuous.
Step 2: Map pronouns and deictic (time) words
Speaker in quotes = Rafi; therefore "I" $\Rightarrow$ "he".
"This weekend" is deictic (relative to the moment of speaking) $\Rightarrow$ "that weekend" in reported speech.
Step 3: Apply tense conversion
Direct: am thinking (Present Continuous) $\Rightarrow$ Past Continuous was thinking.
Step 4: Assemble the indirect sentence
Use the conjunction "that" (optional but standard in exams), remove quotation marks, keep the prepositional phrase "of watching a film":
\[
\boxed{\text{Rafi told Mary that he was thinking of watching a film that weekend.}}
\]
Step 5: Eliminate distractors
(A) thought = Simple Past (loses the "continuous/ongoing" meaning) $\Rightarrow$ incorrect.
(B) is thinking keeps Present Continuous (no backshift) $\Rightarrow$ incorrect with a past reporting verb.
(C) am thinking wrong pronoun and tense ("am" with "he" is ungrammatical) $\Rightarrow$ incorrect.
| a | Phileas Fogg and Jean Passepartout | i | William Shakespeare |
| b | Don Quixote and Sancho Panza | ii | Jules Verne |
| c | Candide and Pangloss | iii | Miguel de Cervantes |
| d | Dogberry and Verges | iv | Voltaire |
| a | Phileas Fogg and Jean Passepartout | i | William Shakespeare |
| b | Don Quixote and Sancho Panza | ii | Jules Verne |
| c | Candide and Pangloss | iii | Miguel de Cervantes |
| d | Dogberry and Verges | iv | Voltaire |